Cluster artifacts with Q-card are invalid.
Check for "cluster" artifacts first so all later code-paths can leave out the M-card check.
Check for K-cards in the "ticket" section, so all later code-paths can leave out this check.
Check for L-cards in the "wiki" section, so all later code-paths can leave out this check.
This saves 9 code-lines while keeping equal functionality (except for the additional Q-card check in Clusters)
check-in: 13e2c73a user: jan.nijtmans tags: trunk